On Sunday 18 October 2026, the residents of HARUMI FLAG, the neighborhood built on the former Tokyo 2020 Olympic and Paralympic Athletes’ Village, are turning the waterfront Harumi Futo Park (晴海ふ頭公園) into a Halloween venue for the day. Entry is free, every activity is free, and you do not have to live in Harumi to come along.
The official name is the Harumi Futo Park Halloween Event 2026 (晴海ふ頭公園ハロウィンイベント2026). This year adds three things the event has not done before: a flea market where all 70 stalls are run by local residents, a walk-around Halloween mystery hunt, and a larger area that now reaches the Harumi Passenger Terminal (晴海客船ターミナル).
Key facts at a glance
| Event | Harumi Futo Park Halloween Event 2026 |
|---|---|
| Date and time | Sunday 18 October 2026, 11:00 to 17:00 |
| Venue | Harumi Futo Park and the area around Harumi Passenger Terminal (Harumi 5-chome, Chuo-ku, Tokyo) |
| Entry | Free. Open to people who do not live in Harumi |
| Activities | Residents’ flea market (70 stalls), Halloween mystery hunt, stamp rally for preschoolers. All free |
| Rain | Goes ahead in light rain, cancelled in stormy weather |
| Parking | The nearest car park is closed all day. Use public transport |
| Official site | Event page (Japanese) |
HARUMI FLAG is a new neighborhood of around 5,700 households. The event is planned and run entirely by residents, and about 3,000 people came last year. It sits alongside the summer Bon Odori dance festival the residents have held since 2024, as the second big community event of the year.
The residents’ Halloween flea market
This is the first proper flea market held in Harumi Futo Park since HARUMI FLAG opened. All 70 stalls are run by people who live in HARUMI FLAG, DEUX TOURS or Harumi Terrace. Commercial traders cannot take part, so what you find is what local families no longer need, plus things residents have made themselves.
Expect items like these:
- Picture books, toys and manga
- Second-hand clothes
- Stationery and kitchen goods
- Handmade crafts and accessories
Each stall is a 3 m by 3 m plot, and stallholders have been asked to decorate theirs for Halloween. Some will be minding their stalls in costume, so a simple walk through the market already feels like part of the party.
If browsing other people’s unwanted things makes you want to clear out your own cupboards, the selling apps are the easiest route in Japan. Our Mercari invite code guide explains how to get points when you sign up, and the Rakuma invite code guide covers Rakuten’s version.
Halloween mystery hunt and stamp rally
Both activities start at the main tent, are free and need no booking.
Halloween mystery hunt (all ages)
A group of puzzle-loving residents built this one from scratch, and it is the first time it has run. Children follow posters around the park to crack the puzzles. Adults can go a step further and use a smartphone to uncover the true secret behind the story.
- Start any time between 11:00 and 17:00
- Takes about 60 minutes
- Free, no booking
- Everything closes at 17:00, so starting by around 16:00 is recommended
How it works:
- Pick up a puzzle booklet at the main tent.
- Find the posters around the park and collect the hidden clues.
- Use the clues to solve the puzzles in the booklet.
- Adults can then take on the final challenge on a smartphone.
Where the finish is and what you get at the end are only revealed to those who solve it. It works at your own pace, so it suits families pushing a stroller as well as groups of friends.
Halloween stamp rally (preschoolers)
This is for preschool children with a parent or guardian. Pick up a stamp card at the main tent, find the five checkpoints hidden around the park, collect every stamp and head for the goal.
How to get there
The nearest car park is closed for the whole day, so plan on public transport. Two bus routes stop right next to the park.
| Route | How to get there |
|---|---|
| Toei Bus | Route To 05-1 (都05-1) from Tokyo Station Marunouchi South Exit and other stops. Get off at Harumi Futo (晴海ふ頭), right by the park |
| Tokyo BRT | From Shimbashi Station, take the bus bound for HARUMI FLAG. Get off at Harumi Futo Koen (晴海ふ頭公園), right by the park |
| Train and walk | Toei Oedo Line to Kachidoki Station (勝どき駅), Exit A4, then about 20 minutes on foot |
You will be outdoors from late morning to early evening, and phones drain fast on a puzzle hunt. If you have a docomo d account, the d VALUE PASS guide to free ChargeSPOT power bank rentals is worth a look before the day.
What the 2025 event looked like
These photos are from last year’s event, when around 3,000 people came. They give a feel for the crowd and the decorations by the waterfront towers.
The announcement does not list a stage programme for 2026, so check the official event page for this year’s line-up.
Tips before you go
- Come in costume if you like. Costumes are welcome, but there is no changing room, so arrive already dressed up.
- Start the mystery hunt early. It takes about an hour and everything ends at 17:00.
- Check the weather. Light rain does not stop it, but stormy weather does.
- Do not drive. The nearest car park is closed all day.
- Ask the organizers directly. Questions go to the HARUMI FLAG Residents’ Association office by email ([email protected]).
Looking for more free days out around Tokyo this autumn? See our guides to the Shibaura Canal Festival with its free canal cruises and the Musashino Art University Festival.
Who runs the event
| Organizers | HARUMI FLAG Residents’ Association (HARUMI FLAG自治会) Eastern District Park Group (東部地区公園グループ) |
|---|---|
| Co-hosts | DEUX TOURS Residents’ Association Harumi Terrace Residents’ Association Real Madrid Foundation Football School Japan |
| Sponsors | Palsystem Tokyo consumer co-op (生活協同組合パルシステム東京) World Family Co., Ltd. (ワールド・ファミリー株式会社) Otsuka Harumi Kaihatsu Co., Ltd. (大塚晴海開発株式会社) |
The residents’ association was set up in July 2024 and runs under the slogan of building new traditions for a new town. Its aim is for this to become a yearly autumn fixture that local children grow up with, and for people from outside to come and get to know Harumi. More on the group is on the HARUMI FLAG Residents’ Association website, and the full announcement is in the press release on PR TIMES (both in Japanese).
FAQ
- Do I need to live in Harumi to attend?
- No. Entry is free and the event is open to visitors who do not live in Harumi.
- Is there a fee for the activities?
- No. Entry is free, and the Halloween mystery hunt and the stamp rally are also free.
- Do I need to book the mystery hunt in advance?
- No. Pick up a puzzle booklet at the main tent any time between 11:00 and 17:00. It takes about 60 minutes, so starting by around 16:00 is recommended.
- Who can join the stamp rally?
- It is for preschool children accompanied by a parent or guardian. Pick up a stamp card at the main tent and find the five checkpoints around the park.
- What happens if it rains?
- The event goes ahead in light rain and is cancelled in stormy weather. Check the official event site on the day.
- Can I drive there?
- The nearest car park is closed all day, so use public transport such as the Toei Bus, the Tokyo BRT or the Toei Oedo Line.
- Can I come in costume?
- Costumes are welcome, but there is no changing room, so arrive already dressed up.
- Can I pay by card at the flea market?
- Payment methods are not stated in the announcement. Check the official event site before you go.
